Fluency Is Speed Plus Accuracy
Knowing 7 × 8 and knowing it instantly are different skills — and the instant kind is what frees working memory for long division, fractions, and algebra later. Timed tests measure exactly that. This one keeps the classic format teachers use (mixed facts, running clock) but adds what paper can’t: the moment you finish, it knows which facts cost you, and one click builds a drill from precisely those. Three or four short rounds beat one long grind — end on the missed-facts drill and the next full test almost always scores higher.
The Reference Grid
For Parents and Teachers
The three modes map to how facts are actually learned: Practice for learning (instant correction), Timed test for the weekly check (feedback held to the end, like the real thing), and the 1-minute sprint for fluency tracking — write the correct-per-minute number on the fridge and watch it climb. The operation switch covers the whole arithmetic ladder: addition and subtraction facts for the early grades, times tables next, and division as inverse fact families (÷7 practice draws from the 7s, answers always come out whole) — one bookmark from first grade to fifth. Settings persist in the browser, so Tuesday’s setup is still there on Thursday. Pair it with the spelling test practice for the other half of homework, or the classroom timer for group rounds.
